ROC
USPTO Trademark Record · Serial No. 73218531
Trademark details
It was initially claimed by Plantronics, Inc. on 19790606.
That brand applies to the following goods and services:Receiver Optimization Circuits, Used in the Telephonics Industry to Limit Telephone Receivers' Audio Amplitudes to a Maximum Level.
You can learn more about that trademark on the USPTO website: View the USPTO record
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